Simple White Noise Generator Circuit - circuitdigest Nov 22, 2018Use of White Noise Generator White noise has a wide range of usage. It is widely used in Music Production. White noise is useful to obtain the impulse response of an electrical circuit. noise_generator [Electron Coaxing Techniques & Notes] The schematic at right, shows about the simplest white noise generator that can be devised. Q2 is used as a zener diode. It's emitter base junction is reversed biased, which in the 2N3904 has a breakdown voltage near 6 volts. The zener action produces random noise, which is from a bandwidth point of view, considered to be “white noise”.